2.6 Check digits Flashcards
1
Q
check digit
A
a calculation on data to create a number that is included with the data for error checking
2
Q
transcription errors
A
errors made when entering data
3
Q
calculating the modulus 11 check digit
A
- if a code is 8 digits, the first 7 are generated and the 8th is calculated
- each digit has a weighting, starting with 2 on the right
- multiply digit by the weighting
- add each subtotal
- divide by 11
- find the remainder
- subtract it from 11
- if the remainder is 10 then an X is used
- if there is no remainder a 0 is used
4
Q
steps to check code using modulus 11
A
if a modulus 11 check digit is used, the code will be divisible by 11 with no remainder
- give each digit a weighting, starting with 1 on the right
- multiply
- total
- divide by 11
- if there is no remainder it is a valid code
5
Q
Find the modulus check digit required for the code 3206736 and write the complete 8 digit code [4]
A
4
32067364
6
Q
A bank account number has a modulus 11 check digit. The account number 21336237 is entered.
Is this a valid number? [4]
A
99/11 = 9
yes
